Product Overview
The 20L Rotary Evaporator bridges the capacity gap between standard benchtop laboratory glass and full-scale industrial evaporation systems. It is engineered for process development laboratories, pharmaceutical intermediate plants, and natural extraction facilities that require batch solvent recovery, concentration, and crystallization before scaling up to mass production.
Key Technical Advantages & Engineering Realities
20L Capacity for Process Scale-Up
Moving from a 1L or 5L benchtop flask to a 20L system allows chemical engineers to validate formulas under real-world production physics.
• The Reality: Small laboratory tests cannot accurately simulate the heat transfer resistance or fluid dynamics of large batches. A 20L volume provides the exact thermodynamic data required to calculate industrial production parameters, reducing the financial risk of investing in unverified large-scale equipment.
• Core Applications: Active Pharmaceutical Ingredient (API) concentration, botanical oil extraction (including ethanol recovery after winterization), fine chemical formulation, and high-purity solvent recycling.
Vacuum-Driven, Low-Temperature Evaporation
The system operates under continuous vacuum to lower the boiling point of targeted solvents.
• Why it Matters: Heat-sensitive chemical compounds and organic extracts degrade or alter their molecular structure when exposed to high atmospheric boiling temperatures. By reducing the internal system pressure, solvents vaporize at significantly lower thermal thresholds, protecting the purity and yield of the active ingredients.
Continuous Thin-Film Rotation Technology
The rotary drive motor spins the 20L flask at an adjustable speed, continuously coating the entire inner surface of the glass with a thin layer of liquid.
• Specific Engineering Benefit: Static heating causes localized hot spots, which can scorch the product. The rotating motion maximizes the liquid surface area exposed to the heating bath, increasing thermal efficiency and accelerating evaporation rates without raising the temperature.
Heavy-Duty Borosilicate 3.3 Glass Architecture
All vapor ducts, condensers, and flasks are constructed from certified Borosilicate 3.3 glass.
• The Specific Reason: This material features a very low coefficient of thermal expansion (3.3×10 −6 K −1 ),making it highly resistant to thermal shock during rapid heating and cooling cycles. Furthermore, its chemical inertness prevents reaction with aggressive organic solvents, acids, and bases, maintaining cross-contamination-free processing. The transparency allows operators to visually monitor boiling behavior and prevent bumping.
Mechanical Stability & Structural Safety
The weight of a filled 20L glass flask requires industrial-grade physical support.
• Structural Design: The equipment uses a heavy-duty, corrosion-resistant stainless steel framework coupled with a counterbalanced manual or motorized lift. This minimizes mechanical vibration during high-speed rotation, preventing glass stress fractures and protecting joints and vacuum seals from premature wear.
B2B Procurement & Customization Capabilities
As a direct factory manufacturer, we support commercial procurement needs with concrete technical adaptations rather than standardized catalog models:
Electrical Specifications: Motors and heating baths can be wired for 220V/50Hz single-phase, 110V/60Hz, or 380V/50Hz three-phase configurations depending on your regional industrial standard.
Explosion-Proof (EX) Upgrades: For facilities handling volatile solvents like ethanol, hexane, or acetone, we provide optional ATEX / IECEx compliant explosion-proof induction motors, sealed control enclosures, and spark-free wiring.
System Integration: Custom configurations for dual receiving flasks (for uninterrupted solvent switching), specialized reflux valves, and matching high-capacity vacuum pumps or recirculating chillers.
International Compliance & Quality Standards
To meet strict regulatory requirements for global pharmaceutical and chemical processing, our systems are built to comply with:
CE Certification for European markets.
ISO 9001:2015 Quality Management Standards.
UL-Compliant electrical components available upon request.
Full documentation (IQ/OQ protocols) supported for GMP facilities.
Technical Specifications
|
Parameter |
Specifications |
|
Evaporation Flask Capacity |
20L (Flange connection for easy removal) |
|
Receiving Flask Capacity |
10L (Equipped with bottom discharge valve) |
|
Rotation Speed Range |
10 - 130 rpm (Digital display and control) |
|
Bath Heating Temperature |
Water bath: RT to 99°C; Oil bath: RT to 180°C |
|
Temperature Control Accuracy |
±1°C (PID micro-processor controller) |
|
Glass Material |
High-Chemical-Resistance Borosilicate 3.3 Glass |
|
Sealing System |
PTFE + FKM Double-Sealed Vacuum Gaskets |
FAQ
Q: Why choose a 20L model instead of a standard 5L lab unit?
A: A 5L unit is designed for milligrams-to-grams R&D. A 20L model allows you to process multiple kilograms of material per batch, which is necessary for pilot production, clinical trial batches, and generating accurate baseline data for industrial scaling.
Q: Can this system run 24/7 for continuous industrial manufacturing?
A: No. Rotary evaporators are batch-processing machines. While the mechanical components and seals are rated for extended duty cycles, the flask must be stopped and emptied after each batch. For continuous 24-hour operation or larger volume flows, we recommend considering our Falling Film Evaporators or Wiped Film Distillation Systems.
Q: What commercial support do you provide to wholesale distributors?
A: We provide direct factory pricing, 1-to-1 engineering support for custom technical specifications, complete structural and electrical documentation for local compliance, and a dedicated inventory of replacement glass components and seals to minimize downtime for your end-users.
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